How does a waterway function?

Why are perennial wells more useful than inundation canals? What do slender loris eat? Where do all the missing people go? What is the density of RCC concrete? What are the currents of earths currents caused by? Where is the source of the river Amazon Nile? What are moai? Where is the Gateway Visitor Center At Independence National Historical Park in Philadelphia Pennsylvania located? Who was the queen of nile? What roller coaster are they riding in entourage? The beginning point of a river is called the? Is Radio City Music Hall at Rockefeller Center? What is the climate of cold temperate evergreen forests? A steep incline of the ocean floor? The Persian Gulf region lies the intersection of? What is the approximate area of the black hills igneous rock of the mount Rushmore? What are the endangered species of the Great Barrier Reef? How many ports does Black Sea have? Open river valleys in hilly areas? What term is used to describe a crescent shaped lake formed when a meander of a stream has been bypassed?